How Can I Save and Display Images Using localStorage Across Page Loads?

Saving and Displaying Images Using localStorage Across Page Loads

Problem:

Users can upload an image, fill out form inputs, save the form to localStorage, and proceed to a new page. The goal is to also save the uploaded image to localStorage and display it on the next page.

Solution:

1. Grabbing the Image:

   • Use getElementById to retrieve the HTML element containing the image.

2. Converting to Base64:

   • Define a function to convert the image to a Base64 string representation using canvas and toDataURL.

3. Saving to localStorage:

   • Store the Base64 string as a value in localStorage using setItem with a unique key.

4. On the Next Page:

   • Create an image element with a blank src attribute.
   • Retrieve the Base64 string from localStorage using getItem.
   • Update the image's src attribute to include the Base64 string.

5. Example Code:

   • Saving to localStorage:

     const imgData = getBase64Image(document.getElementById('bannerImg'));
     localStorage.setItem('imgData', imgData);

   • Displaying on next page:

     const dataImage = localStorage.getItem('imgData');
     const bannerImg = document.getElementById('tableBanner');
     bannerImg.src = "data:image/png;base64," + dataImage;

This solution allows you to save the uploaded image to localStorage as a Base64 string and display it on a different page by retrieving the string and setting it as the image's src attribute.

The above is the detailed content of How Can I Save and Display Images Using localStorage Across Page Loads?. For more information, please follow other related articles on the PHP Chinese website!